Eta2 Fornacis

Eta2 Fornacis (η2 Fornacis) is an orange giant in the constellation of Fornax. The star has a spectral type of K0III and an apparent magnitude of 6.02. The star is visually close to, but unrelated with the similar stars η1 Fornacis and η3 Fornacis.[4] The star is located at approximately 425 light years away, and forms a visual binary system with a 10th magnitude companion.[6]

η2 Fornacis
Location of η2 Fornacis (bottom star inside circle)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Fornax
Right ascension 02h 50m 14.7837s[1]
Declination −35° 50′ 37.023″[1]
Apparent magnitude (V) 5.47[2]
Characteristics
Evolutionary stage giant
Spectral type K0III[3]
B−V color index 0.9[4]
Astrometry
Radial velocity (Rv)17.30±0.76[1] km/s
Proper motion (μ) RA: +51.003[1] mas/yr
Dec.: +18.217[1] mas/yr
Parallax (π)7.6745 ± 0.1512 mas[1]
Distance425 ± 8 ly
(130 ± 3 pc)
Details
Mass2.9[1] M☉
Radius9.4[1] R☉
Luminosity72[1] L☉
Surface gravity (log g)2.76[1] cgs
Temperature5,061[1] K
Age414[1] Myr
Other designations
η2 For, CD−36°1067, HD 17793, HIP 13225, HR 851, SAO 193940[5]
Database references
SIMBADdata

References
  1. Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. Hoffleit, D.; Warren, Jr., W. H. (1991). The Bright Star Catalogue (5th Revised ed.). New Haven: Astronomical Data Center, NSSDC/ADC. Bibcode:1964cbs..book.....H.
  3. Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0. Bibcode:1982mcts.book.....H.
  4. "η2 Fornacis (eta2 Fornacis)". The Sky Live. Retrieved 17 October 2023.
  5. "* eta03 For". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2023-09-28.
  6. "VizieR". VizieR. Retrieved 17 October 2023.


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